RSSCalendar allows users to share their calendars with family, friends, and co-workers using RSS.

Here are some nice features:

Create RSS feeds that show your calendar by day, week, month, or year
Create calendar feeds that are public, private, or category-based
Syndicate your RSSCalendar to a website
Create calendar events that include map and weather information

And more…Check all the features here

RSSCalendar